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Viptela Documentation

dhcp-helper

vpn interface dhcp-helper—Allow an interface to act as a DHCP helper (on vEdge routers only). A DHCP helper interface forwards BOOTP (Broadcast) DHCP requests that it receives from the DHCP server specified by the configured IP helper address.

You can configure a DHCP helper only on service-side interfaces. These are interfaces in any VPN except VPN 0 (the WAN-side transport VPN) and VPN 512 (the out-of-band management VPN).

vManage Feature Template

For vEdge routers only:

Configuration ► Templates ► VPN Interface Bridge
Configuration ► Templates ► VPN Interface Ethernet
Configuration ► Templates ► VPN Interface PPP Ethernet

Command Hierarchy

vpn id
  interface interface-name    
    dhcp-helper ip-addresses

Options

IP Address of DHCP Server
ip-addresses
IP addresses of one or more DHCP servers. You can configure up to eight IP addresses in a single dhcp-helper command. The addresses cannot be broadcast addresses.

Operational Commands

show running-config vpn interface

Example

Configure the IP address of a DHCP server to allow an interface to be a DHCP helper:

vEdge# config
Entering configuration mode terminal
vEdge(config)# vpn 1 interface ge0/4
vEdge(config-interface-ge0/4)# dhcp-helper 10.22.11.1
vEdge(config-interface-ge0/4)# commit and-quit
 Commit complete.
vEdge# show running-config vpn 1 interface ge0/4
vpn 1
 interface ge0/4
  description "VPN 1 interface"
  ip address 10.20.25.16/24
  dhcp-helper 10.22.11.1
  no shutdown
 !
!

Configure multiple DHCP helpers:

vEdge(config-interface-ge0/4)# dhcp-helper 10.20.24.16 10.20.24.17 10.20.24.18 10.20.24.19 
vEdge(config-interface-ge0/4)# show full-configuration 
vpn 1
 interface ge0/4
  ip address 10.20.24.15/24
  dhcp-helper 10.20.24.16 10.20.24.17 10.20.24.18 10.20.24.19
  no shutdown
 !
!

Release Information

Command introduced in Viptela Software Release 14.1.​
In Release 14.3, add support for four IP addresses on a single DHCP helper interface.
In Release 17.2.2, add support for eight IP addresses on a single DHCP helper interface.

Additional Information

dhcp-server

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